The Ultimate Griddled Patty Melt with Secret Frisco Sauce

🌍 Cuisine: American
🏷️ Category: Main Course
⏱️ Prep: 20 minutes
🍳 Cook: 40 minutes
πŸ‘₯ Serves: 2 servings

πŸ“ About This Recipe

Born in the golden age of American diners, the Patty Melt is the soulful marriage of a juicy burger and a decadent grilled cheese. This version features perfectly caramelized onions, high-quality ground chuck, and tangy melted Swiss cheese nestled between thick slices of buttery, griddled rye bread. It is the ultimate comfort food experience, offering a satisfying crunch that gives way to a rich, savory center.

πŸ₯— Ingredients

The Caramelized Onions

  • 2 large Yellow Onions (thinly sliced into half-moons)
  • 2 tablespoons Unsalted Butter
  • 1/4 teaspoon Kosher Salt
  • 1 tablespoon Water (to deglaze the pan)

The Secret Sauce

  • 1/4 cup Mayonnaise (full fat preferred)
  • 1 tablespoon Ketchup
  • 1 tablespoon Dill Pickle Relish
  • 1/2 teaspoon Worcestershire Sauce
  • 1/8 teaspoon Smoked Paprika

The Burger & Assembly

  • 1 pound Ground Chuck (80/20) (divided into two 1/2 lb oval patties)
  • 4 slices Seeded Rye Bread (thick-cut)
  • 4 slices Swiss Cheese (aged GruyΓ¨re also works beautifully)
  • 3 tablespoons Unsalted Butter (softened for spreading on bread)
  • to taste Salt and Black Pepper (freshly cracked)
  • 1/2 teaspoon Garlic Powder (for seasoning the meat)

πŸ‘¨β€πŸ³ Instructions

  1. 1

    Start the onions by melting 2 tablespoons of butter in a large skillet over medium-low heat. Add the sliced onions and salt.

  2. 2

    Cook the onions slowly, stirring occasionally, for 25-30 minutes until they are deep golden brown and jammy. If they look dry, add a splash of water to scrape up the fond.

  3. 3

    While onions cook, whisk together the mayonnaise, ketchup, relish, Worcestershire, and paprika in a small bowl. Set aside in the fridge to let flavors marry.

  4. 4

    Shape the ground chuck into two oval-shaped patties that are slightly larger than your bread slices, as they will shrink during cooking.

  5. 5

    Season both sides of the patties generously with salt, black pepper, and garlic powder. Press a slight dimple in the center to prevent bulging.

  6. 6

    Remove the finished onions from the skillet and set aside. Wipe the skillet clean and increase heat to medium-high.

  7. 7

    Place the beef patties in the hot skillet. Sear for 3-4 minutes per side until a dark, crusty sear forms and they reach an internal temp of 145Β°F (for medium). Remove patties and set aside.

  8. 8

    Wipe the skillet again. Generously butter one side of all four rye bread slices.

  9. 9

    Place two slices of bread, butter-side down, in the skillet over medium heat.

  10. 10

    Quickly assemble: Layer one slice of Swiss cheese on each piece of bread, followed by a beef patty, a heap of caramelized onions, and a second slice of cheese.

  11. 11

    Spread the secret sauce on the non-buttered side of the remaining bread slices and place them sauce-side down on top of the onions.

  12. 12

    Grill for 2-3 minutes until the bottom is golden brown, then carefully flip. I recommend using a heavy press or another skillet to press down slightly for maximum contact.

  13. 13

    Cook for another 2 minutes until the second side is toasted and the cheese is completely melted and cascading down the sides.

  14. 14

    Remove from heat, let rest for 60 seconds so the juices redistribute, then slice diagonally and serve immediately.

πŸ’‘ Chef's Tips

Use 80/20 ground chuck for the best flavor; lean meat will result in a dry sandwich. Caramelizing onions cannot be rushedβ€”low and slow is the secret to that sweet, savory depth. Always butter the bread all the way to the edges to ensure a perfectly even, golden-brown crunch. If your cheese isn't melting fast enough, add a teaspoon of water to the pan and cover with a lid for 30 seconds to create steam. Shape the patties slightly larger than the bread, as they will shrink by about 20% during the searing process.

🍽️ Serving Suggestions

Serve with a side of extra-crispy, double-fried French fries or thick-cut onion rings. A cold, crisp dill pickle spear is the traditional and necessary palate cleanser. Pair with a classic chocolate malt or a cold cream soda for the full diner experience. A simple side of creamy coleslaw provides a refreshing, acidic contrast to the rich sandwich. For a drink pairing, a hoppy IPA or a bold Amber Ale cuts through the fat of the beef and cheese beautifully.